38278685 has 4 divisors (see below), whose sum is σ = 45934428. Its totient is φ = 30622944.

The previous prime is 38278661. The next prime is 38278703. The reversal of 38278685 is 58687283.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6446521 + 31832164 = 2539^2 + 5642^2 .

It is a cyclic number.

It is not a de Polignac number, because 38278685 - 2¹² = 38274589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3827864 + ... + 3827873.

It is an arithmetic number, because the mean of its divisors is an integer number (11483607).

Almost surely, 2^38278685 is an apocalyptic number.

It is an amenable number.

38278685 is a deficient number, since it is larger than the sum of its proper divisors (7655743).

38278685 is an equidigital number, since it uses as much as digits as its factorization.

38278685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7655742.

The product of its digits is 645120, while the sum is 47.

The square root of 38278685 is about 6186.9770486078. The cubic root of 38278685 is about 337.0174099550.

The spelling of 38278685 in words is "thirty-eight million, two hundred seventy-eight thousand, six hundred eighty-five".